13581222 has 32 divisors (see below), whose sum is σ = 28447200. Its totient is φ = 4316928.

The previous prime is 13581199. The next prime is 13581229. The reversal of 13581222 is 22218531.

It is a junction number, because it is equal to n+sod(n) for n = 13581192 and 13581201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13581229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15048 + ... + 15924.

It is an arithmetic number, because the mean of its divisors is an integer number (888975).

Almost surely, 2^13581222 is an apocalyptic number.

13581222 is an abundant number, since it is smaller than the sum of its proper divisors (14865978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13581222 is a wasteful number, since it uses less digits than its factorization.

13581222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000.

The product of its digits is 960, while the sum is 24.

The square root of 13581222 is about 3685.2709534036. The cubic root of 13581222 is about 238.5867288269.

Adding to 13581222 its reverse (22218531), we get a palindrome (35799753).

The spelling of 13581222 in words is "thirteen million, five hundred eighty-one thousand, two hundred twenty-two".